Air control for internal-combustion engines



Feb. 18, 1930. w. J. DICKSON 1347,353

I AIR CONTROL FOR INTERNAL COMBUSTION ENGINES I Filed Dec. 6. 1927 Patented Feb. 18, 1930 UNHTED STATES WILLIAM J. DICKSON, F BROOKLYN, NEW YORK AIR CONTROL FOR INTERNAL-COMBUSTION ENGINES Application filed December 6, 1927. Serial No. 238,110.

Among the principal objects which the present invention has in view are: to provide means for over-supplying atmospheric air to the mixing chamber of a carburetor for internal combustion engines; to provide means for regulating the auxiliary air admitted to the mixing chamber of a carburetor in correspondence with the adjustment of the ignition system; to save fuel consumption in the operation of an internal combustion engine; and to cool the cylinders of an engine of the character mentioned above when in service.

In the drawings:

Figure 1 is a side elevation of a carburetor partly cut away to show the interior construction thereof and certain of the operating features of a controlling mechanism constructed and arranged in accordance with the present invention.

Figure 2 is a horizontal section of a carburetor shown in Figure 1, the section being taken on the line 22 therein.

Description I have illustrated my invention as applied to a certain type of carburetor having an auxiliary air valve 7 which is maintained closed by a spring housed in th chamber 8 which operates through a connecting rod 9 to maintain the valve 7 normally closed.

It will be understood, however, that the invention is equally applicable to other types of carburetors which have spring-seated auxiliary air valves. The operation of the valve 7 under air pressure it is thought unnecessary to describe in this application.

The present invention may be said to consist in means for accentuating or augmenting the action of the air valve to open the same to a degree where the attenuation of the gas is so greatas to suspend the suction of the gasoline from the spray nozzle of the carburetor. WVith this end in view, a finger 10 is provided, the terminus of which rests against the outer side of the valve 7 and preferably at about the center thereof. The finger 10 is rigidly mounted upon a shaft 11 which is extended through the side wall of the carburetor and through a bushing 12 rotatively mounted therein.

As seen best in Figure 1 of the drawings, the shaft 11 is rectangular in cross section, thereby being retained non-rotatively in the bushing 12.

Mounted on the rectangular shaft 11 at the outer side of the carburetor is a lever 13, which is held in position by means of the nut 14:. The lever 13 has at the end thereof a boss 15 through an enlarged slot in which extends a pull rod 16. The rod 16 is furnished with an adjustable nut 17 to engage the boss 15 of the lever 18 when the rod 16 is drawn in the direction indicated by the ar row in the drawing. The rod 16 is so moved when a nut 18 at the opposite end of the rod 16 is en aged by the perforated lug 19, which as shown in the drawings is rigidly held on the rod 20 by means of a set screw 21. Normally, the rod 16 is drawn backward by the spring 23, which is stretched between the nut 14 and the hook 24: on the rod 16. Such an arrangement holds the nut 18 against the lug 19 while the nut 17 is separated from the boss 15. V

The rod 20 forms part of the mechanism for timin the sparking mechanism of the automobile.

The mechanism above described is designed to operate to open the valve 7 to a degree where the influx of air through the intake passage 22 destroys the suction onthe spray nozzle of the carburetor, thus suspending the supply of gasoline therefrom. It is desired to accomplish this by means of the spark control lever which is moved to its extreme retard position when the driver of the autoinobile desires to so open the valve 7. To this end the rod 16 has a nut 18, which in theoperation of the apparatus is engaged by the lug 19 to be moved in correspondence with the rod 20 when and as the same is being moved to retard the timing of the spark mechanism of the engine. 7

. It will be observed that in accordance with the disposal of the nut 17, the lever 13 will be engaged thereby and by the rod 16 to rock the said lever and the finger 10 connect ed therewith to open the valve 7. The nut 17 is adjusted so that it is only when the retard position of the ignition control lever is in full retarding position that the said nut and the lever 13 connected therewith is moved to a position where the finger 10 holds the valve 7 fully open as to interrupt the engine suction on. the spray nozzle of the carburetor.

It will be seen that when the spark is advanced the regulating spring in the chamber 8 returns the valve 7 to its working positionat this period probably closedand allows the suction of the engine to be exerted upon the spray nozzle to draw the gasoline therefrom for vaporization. This apparatus is particularly convenient when it is desired to use the resistance of the engine as a braking influence on the automobile, as in coasting down a'hill or drifting in traflic. Under these conditions it will be appreciated the saving of gasoline is accomplished and the cooling of the cylinders of the engine is materially effected. V

I claim:

1. In combination with an automobile having a carburetor and hand controlled ignition system, an apparatus as characterized comprising means operatively connecting the auxiliary air valve of said carburetor and the hand lever for controlling the timing of said ignition system, whereby when the said lever is moved to ignition retarding position, the said valve is opened in excess of its maximum auxiliary service position, said means embodying a thrust member for said valve; and means connecting said thrust member With said hand lever to be operated after said hand lever has been moved a predetermined distance, said second mentioned means embodying a rocking mounting for said thrust member, a connecting rod operatively connected with said rocking mounting for rocking the same, said connecting member being operatively connected with said hand lever and parts associated therewith to provide a lost motion for said connecting memher. I

2. In combination with an automobile having a carburetor and hand controlled ignition system, an apparatus as characterized comprising means operatively connecting the auxiliary air valve of said carburetor and the hand lever for controlling the timing of said ignition system, whereby when the said lever is moved to ignition retarding position, the said valve is opened in excess of its max imum auxiliary service position, said means embodying a finger rotatively mounted in the frame of said carburetor on the inlet side of said air valve, said finger being disposed to contact with said air Valve to rock the same in its mountings; a rocking lever mounted external to said carburetor for rocking said finger; a connecting rod for operating said rocking lever; and means for connecting said connecting rod with the transmission rod of ing rod.

WILLIAM J. DICKSON. 

